*{
    padding: 0;
    margin: 0;
}
.box{
    width: 300px;
    margin-top: 20px;
    position: relative;
}
.box .picture{
    width: 450px;
    height: 450px;
    border: 3px solid black;
    background: url(./1.webp) no-repeat 100%/100%;
    position: relative;
}
.box .picture .mask{
    width: 150px;
    height:150px;
    position: absolute;
    left: 0;
    top: 0;
    background-color: rgba(128, 128, 128, 0.527);
    display: none;
  
}
.box ul{
    width: 100%;
    height: 50px;
    display: flex;
    justify-content: center;
    
}
.box ul li{
    width: 48px;
    height: 48px;
    border: 1px solid black;
    list-style: none;
    margin: 0 20px;
}
.box ul li.active{
    box-shadow: 0 0 5px red;
}
.box ul li img{
    width: 100%;
    height: 100%;
}
.box .enlarge{
    width: 300px;
    height: 300px;
    background-color: red;
    position: absolute;
    left: 480px;
    top: 0;
    background:url(./1.webp) no-repeat;
    background-position: 0px 0px;
    background-size: 800px 800px;
    display: none;
}

        